Safe.



W. G. BOLLWINKEL & E. G. KLINE.

SAFE.

APPLICATION FILED NOV 5, 1914.

Patented F 9, 1915.

STATES PATENT OFFICE.

WILLIAM c. BOLLWINKEL AND EVERETT c. KLINE, or noswoon, OHIO, AssIss eRs T AMERICAN BANKERS SAFETY COMPANY. or CINCINNATI, OHIO, A Charo-Barron or DELAWARE.

SAFE.

Patented e1), 9.1915.

Application filed November 5, 1914. Serial No. 870,388.

foal! whom it may concern have invented certain new and useful 1111- I provementsin Safes, of which the followmg is a specification.

' Our inventionv relates,..to-the construction of safes and particularlyto improvements construction of the parts by which -conical, cyliniifical'or similarly shaped safe doors, which are rotated to screw into and out Of closed position, are mounted in closed position and guided into and out of such position. In safes of this character as pr'e viously constructed, a-helical machined and ground metal-key or thread has been forced into position in .a correspondingly shaped leadformed in the jamb of the door,- this keyf engaging within a corresponding'lead formed in the conical or cylindrical-ground surface of the door. In our construction, a

'turned and finished key is mounted in the 2's ,;and.secured therein, this key engaging within a corresponding lead formed in the jamb.

helical lead or key way formed on the door The key or metal thread member is secured in position in the lead ofthe door by means of securing devices extending from-the interio -"of the door into the rear portion ofthe key. In a door of preferred construction, which is cast of manganese steel with a cored interior recess having an opening atthe rear of the door and having a tapered or annular flange surrounding this recess, inserts of soft-metal will be provided extending through the flange of the door to the inner surface of the lead formed on the exterior of the flange. Holes are drilled through these soft metal inserts and when the turned and finished key has been forced into position in the lead of the door,

fbolts or screws are passed through the drilled holes inthe soft metal and into corresponding tapped holes in the rear face oft-he key thereby securely holding the key or thread in place.

In order that 21 our invention may by directed to the accompanying drawings forming part of our invention and illustrafing a preferred embodiment thereof.

In the drawings, Figure 1 represents a partial section through the jamb of a safe clearer understanding of proved manner to a given fin be had, attention is herewith the door. mountedfin. positionthrein, Fig. 2 represents a 1partial se ction through thedoor showing; thea method of securing the key in position thereoruas described.

Referring to the -drawings,*the=- door1 is illustrated as seated within the jamb fz, the Surface 3 of the door and the corresponding cal. The lead 4 is ground into :the surface of the amb, at any desired angle or" pitch, and the door is provided witha corresponding lead. The door and theja rnb'fnerhber of the safeare formed o f cast niarfganese steelor of other metaliiwirich 'in'zl satisfactory for the purposeiw -T cast is provided with ooni'cahflafige fi surrounding an. inner 'space -6'-,'*t'he cadthe door being cored, and ground I ""she" -f"size, The helical key 7 is made of some suitable material of machinable nature, preferably vanadium steel. This key is turned as a single pieceand finished to fit into the lead ground in the safe door. In manufacturing the parts described, the jamb and the external surface of the door are ground on an angle to the desired shape and are then finished by means of slush grinding. After this operation, the key 'l' is then forced into position and attached by the means referred to. A series of soft metal parts 8., which we have referred to as soft metal inserts, are provided extending at intervals through the flange 5 of the door, extending through the same to the inner edge ofthelead formed in the exterior surface 3 of flange 5. These soft metal portions may be inserted into cored openings formed when thedoor was cast. Holes are drilled through..- these 'insorts and the key 7 is provided with a corresponding number of tapped holes so that when the key has been placedin position and adjusted with thetapped holes of the key in line with the openings extending through the soft metal inserts, the bolts or screws 9 may be extended through the soft metal in serts and screwed into the key securely attaching the latter inposition.

If desired, a slight recess may be ground on the step of the jamb of the safe and filled with a rubber orother suitable packing '10, to form a. seat for the doorv in case the slushgrinding ofthe door and jamb has'n'ot resulted in the formation of a sufficiently close surface of the jamb being illustrateda*sconijoint. When the door has been swung into place, it may be caused to revolve by usual means, not illustrated, such as a pinion and gear so as to force the door into the tapered jamb to form a close contact between the door and the jamb.

It will readily be understood that our invention provides a construction in which the coacting parts may be readily and effectively ground so as to operate with the close contact required in high class safe construction, the key also beingvery readily mounted in position in the lead of the door, our invention also taking advantage of the central cored recess of the door to extend screws or other securing devices from thesame through the flange of the door into the laying described our invention, what wel claim as new therein and desire to secure by Letters Patent of the United States is:

1. In a safe, the combination of a body member having a conical jamb, having a helical lead ground therein, a door having an inner recess and a conical surface having a helical ground lead corresponding to that of the jamb, a helical key positioned 'in'thef lead of the door and adapted to engage with-- in the lead of the jamb, and a plurality of securing devices extending from. said recess through portions of said door into said key, substantially as set forth.

2. In a safe, the combination of a iamb member having an inner surface of circular cross-section, having a helical lead formed therein,- a door of hard cast metal having a flange portion, theouter surface of which is adapted to seat within said jamb surface, said door having a helical lead formed in the outer surface of said flange portion CO1? responding to the lead of the jaxnb, a helical metal key positioned in the lead of the door and adapted to engage within the lead of the jamb, soft metal inserts extending from the interior'of said flange portion to 'the leadin the door, and screws extending 

